US3983101AExpiredUtilityPatentIndex 42

Water-soluble polyazo compound derived from 4-4-diaminobenzanilide

Assignee: ACNAPriority: Feb 11, 1974Filed: Oct 28, 1975Granted: Sep 28, 1976

Est. expiryFeb 11, 1994(expired)· nominal 20-yr term from priority

Inventors:PAPA SISTO SERGIO CONDO ANTONINO FERRARIO RENZO

C09B 35/64C09B 35/38C09B 45/28

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Abstract

Sulphonated azoic dyestuffs of the formula: ##SPC1## Are useful in dyeing cotton, other cellulosic fibers, natural and synthetic polyamide fibers and leather.

Claims

exact text as granted — not AI-modified

Having thus described our invention, what we desire to secure by Letters Patent and hereby claim is: 
     
       1. A sulphonated azoic dyestuff of the formula: ##SPC3##

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